Welded tank



A. DAvls, .n

Jan. 17, 1928.

WELDED TANK Filed J an.

22. 1927 2 Sheets-Sheet 1 1 A TTORNEY /N VEN TOR A. DAvl's, JR

Jan. 17, 1928.

WELDED TANK led Jan 1927 2 SheetsSheet 2 llllll [NVE/WOR `25 connection between `4.0 of the sheet;

Patented Jan. 17, 1928.

UNITED STATES AUGUSTINE DAVIS, JR.. F CINCINNATI, OHIO.

WELDED TANK.

i Ap'piication led January 22, 1927. Serial No. 162,703.

lhis invention relates vto welded construction for compartment tanks of tank trucks, the object beingvto provide a partition construction of maximum strength to resist the severe strains, including the surge of the liquid against the partition heads. to which such tanks are subjected. The objectis likewise to permit of the use of comparatively light gauge metal without danger of breakage or. leakage, the lightening of the'dead weight that must be transported being an important consideration. The object is, further, to secure these advantages while retaining the advantages, hitherto obtained by a different construction of less inherent strength, of double partitions, each forming the closed end of its compartment, with the liquid-retaining welds outside welds so that if any leak should occur at these welds it can be observed and readilyrrepaired. Still another object is to provide in a novel and advantageous manner for compensating for localized expansion or contraction occasioned by the welding of the the compartments. Another feature of preferred construction con vvsists in the provision of separate finish.

bands, welds,

each covering one of t e two'pairs of' the advantage of which will become .30 apparent.

In the accompanying drawings forming partl hereof: 'j y Fig. 1 is a side .elevation of a compartment tank showing the partitionconstrubtion between two compartments, with portions of the finish bands broken away and in section, the tank being broken out at opposite sid es of the partition in order to contract the showing of the tank within the width Fig. 2 is a longitudinal sectional view on a larger scale of the partition construction, the tank being broken out longitudinally in order to economize space; and

Figs. v3 and 4 are views similar to Fig. 2,

showing modifications.

For simplicity Fig. 1 may beiconsidered to represent a vehicle tank of two compartments 2, 2, though it will be understood that these tanks commonly consist of three or more compartments, and that the partition -construction will occur at as many pinctions between compartments as there may be.

, The tubular shells of the compartments .55 are marked 3, 3, and the partition heads are marked 4, 4.

an improved lriors of the compartments.

may be tacked My Patent 1,311,155 of successful in practice, and the advantages of which are retained in they present invention, plus the advantage of greater strength for given weight, or more practically stated, very ample strength with more lightness. In that patent it will be observed thatthe spaced apart partition heads are inserted into the adjacent ends of the shells, head wall first, with the flanges extending toward each other, these ianges being welded to the shells and their edges being bent outward and welded together. The patent shows the diaphragm walls ofthe heads straight, but for greater strength it has been the practice to form them with a dish, that is to say, concavo-convex, the bulge of the dish for necessary reasons being away from the iiange, or in other words inwardly of the liquid-holding compartment.

In the present. invention the disposition of the compartment headsjis reversed, and their flanges 5, 5 .are inserted edge first into the adjacent ends'of the shells 3, 3, the heads themselves protruding from the shells, with their bulges outward fromthe inte- The anges 5, 5 need be inserted only a comparatively short distance into the' shells, to which the flanges are united by continuous, Huid-tight welds 6, 6 joining the edges of the shells to the outer sides of the flanges. The complete liquid-tight compartments are then connected together by a connecting band 7, which overlaps the portions of the tianges 5 projecting and by welds 8, 8 which unite the edges of the band 7 to the outer sides of the head flanges. The welds 8 do not retain the liquid contents of the compartments and need not necessarily be liquid-tight. The welds 6 which do retain the liquid are outside welds and are readily accessible.

The connecting band 7v is preferably formed with one or more beads, bends or crimps 9 intermediate the welds 8 to compensate for strains set up in welding. This bead .maybe outwardly directed, as inlFigs. 1 .and 2, or inwardly, as in Fig. 3, or it may be omitted entirely as in Fig. 4;

In order to cover the welds, ing them readily accessible, two finish bands 10 are provided, each'band of a width to embrace a pair of welds 6,8. These bands in place by welding as indifrom the shells beyond the welds 6,V

July 29, 1919,

covers a construct-ion which has been highly cated at 11, .or held in place mechanically, or both.

Fig. -l illustratesithe fact that a single wide finish band lc may be used to cover all four welds, as well as the connecting band, but the use of separate bands has the advantage that a Supply of finish bands all of the same size will serve irrespective of the spacing between the shells in different jobs. In this connection it may be stated that the distance between the heads at the circumference Will necessarily vary according to the diameter of the tank and the amount of dish in the heads. The heads need not Ihe spaced at the circumference more widely than is compelled by the approach of their convexities at the center, Where it is f preferable that there be a slight distance between.

A telltale drip-pipe l2 is Welded into the bottom of the connecting band 7 to give 1ndication in the unlikely event of there being' partments, of flanged partition heads having their flanges set edge first part Way into the adjacent ends of said shells and Welded thereto, with the heads themselves protruding toward each other, and a connecting band overlapping and welded to the flan es of both heads where they .protrude from t e shells.

2. In a welded compartment tank, the

combination with the shells of two tank compartments, of flanged partition heads having their flanges set edge first part way into the adjacent ends of said shells and Welded thereto, with the heads themselves protruding` toward each other, and a connecting band overlapping and Welded to the flanges oll both heads where they protrude from the shells, said connecting band containing means for taking up localized expansion and contraction.

3. In a 4welded compartment tank, the combination with the shells of two tank coinpartnients, oi flanged partition headshav"A ing their flanges set edge first part wayinto the adjacent ends of said shells and Welded thereto, with thel heads themselves protrudingtoward each other, and a connecting band overlapping and welded to the flanges of both heads where they protrude from the shells, and tivo separate finish bands, each encircling one pair of welds between a head, its shell and the adjoining end of the connecting band.

4. A welded partition construction between the liquid-holding compartments of a multiple-compartment welded tank, comprising the shells, protruding partition heads set flange first into vthe adjacent ends of the shells and'welded thereto, and means uniting the compartments thus formed.

5. A welded partition construction between the liquid-holding compartments of a multiple-com artment Welded tank, comprising' the shel s, protruding partition heads. y set flange first intothe adjacent ends of the shells and welded thereto, and a connecting band welded to and uniting the compartments thus formed.,

AUGUSTINE DAVIS, J n. 

